Relief-valve.



A. POSP ESEL. RELIEF, VALVE. APPLICATION FILED MN. 16. 19I8.

1,274,775 Patented Aug. 6, 191&

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ANDREW rosrnsnn, or oswned nnwvonm v ItELIEF-VLVE.

To all whom it may concern: I n

'Be itknown thau'I, ANDREW citizen of the United States, residin at Oswego, in the'county of Oswego and tate of New York, have invented certain new and useful- Improvements in' Relief-Valves, of

which the 1 followin is a} specification;

' This invention re ates .to relief valves 'for draining the water of condensation from steam pipes and has special reference to relief valves ofthe type-disclosed in Letters Patent No, 1,192,113, granted to me-July The invention is illustrated in the acoom panying drawings and will be hereafter fully-described, the novel. features being particularly pointediout in the appended claim- I r V In the jdrawings Figure -1 is an "levation of a -relief valve F embodying my present improvements;

In the drawings, the reference numeral 1 designates a pipe or tube of thermostatic material which is engaged at one end in a steam supply pipe so as to communicate therewith. Around the thermostatic tube or pipe, at the inner end thereof, is secured a clamp collar 2 having aperforated lug or post 3 on one side. At the opposite or outer endof the thermostatic tube or pipe is mounted a head 4, a vent or drain passage 5 being formed in the said head and communicating with the interior of the thermostatic tube or pipe soas to form an outlet for the water of condensation which tends to collect therein. The inner end of the vent passage 5 is beveled, asshown at 6, to form a seat for a valve 7 which has its stem 8 extending through the outer end of the head 4 and through a packing box 9 secured in said head. In the form of the device shown in Figs. 1 and 2, the valve stem 8 has acollar or disk 10 secured to its outer end and a spring 11 is coiled around the stem between the said collar and the head 4 so as to hold the valve normally seated and thereby prevent theescape of steam from Specification of Lettersi'atent. I

PosrEs EL,

Patented 1913.

7 Application filed January 16; 1918. Serial a). 212,017."

a the, thermostatic .tube Apsuppo'rting arm '12 is projected from one side of the head 4 and is preferably'sformed integral there with, the said arm extending obliquely soas to project beyond the end'of the head as well as laterally therefrom and to the outer extremityi'ofthe said armis pivotally secured a lever 13 which is bifurcated, as shown most clearIyinFigJQ, so as .to straddle the end of the arrn12 :and: thereby reduce the strain upon the pivot pin 14. Within the extremity of the bifurcated portion of. the lever is IPIV". otally .attached the outer end of. a brace 15 .1 which has its inner'end inserted throughland securedin' the, perforated lug 3 upon the clamp collar 2, this brace 15 beingsolid and constructed of some material which is not readily affected. by changes. :in. temperature so that it will remainapproximately con- 75 stantm length, The distance betw'een the pin 14- and the pin- 16, securing the brace rod15 to the lever,.constitutesthe short arm 7 I of the leve'r,-.whi*le thelonger arm of the lever extends across the axialplane of the valve stem 8. In the free end of the lever is mounted: an. adjusting screw: 17 .which has its inner end bearing upon the outer end of the valve stem, or upon the collar 10 se-' 7 cured thereto, and its outer end is formed or provided with a head 18 by which it may be readily rotated so as to properly adjust the valve. A look nut 19 is mounted upon the screw 17 and bears against the outer side of the lever '13 so. as to hold the parts in the set adjustment.

The head 4 maybe fitted directly upon the end of thethermostatictube but I pre-" fer to connect the tube and-head by a T-' coupling or trap 30 equipped with a cap 31 and provided internally with a screen 32 whereby the fiow of scale or rust to the vent valve 7 will be prevented. Obviously, removal of the cap 31 will permit withdrawal of the accumulated scale or other deposit.

The operation of the valve will be. readily understood. 'In the normal condition of, the apparatus, the valve is seated and flow through the ventpassage 5 is prevented, but

if the steam pressure should fall so that the temperature of the steam pipe and the thermostatic tube should be reduced, the said tube will contract and the head'4 will obviously tube. This movement of the head will cause a relative shifting of the pins 14 and 16 infollow the axial movement of the asmuch as the braoe15 is -relatively-stationary or "fixed. Consequently, the "free end of the lever 13 will swing inwardly more rapidly than the outer end of the --same moves inwardly and this accelerated movement of the free end of the lever willbe transmitted through the screw 17 directly to the valve stenrS sothatthe valve will'be moved from its seat and thewatersof 5-0011 den'sation permitted to escape. Of course, as the: supply of: steam is replenishediand the temperature again raised, the :.parts .will move in: the; reverse direction. and theavalve will beautomatioallyseated. 1It will.;tlrus be seen that 11 liaveiprovided. anrexcedingly simple, compact, strong, and. .duralbleadevice whiclrwillzzvutoinatically permit drainingeof a steam upipel and automatically. cut-off 's the escape of steamanider; normal. conditions.

'Inthe arrangement"shown.in Figs. vi and 5,.theithermostatic".tube, the head 21, lever 22,. an d braoe;23: are: the -:samenasl the correspending: parts 5.:"ll1 the previously: described arrangement. Thewalvefll :isihe sameaas the valve 7 but has tits rstem 25eextended through an open: ended slot 26 l in the free end of I the i lever sand an aadj usting :nut i or sleeve '27: is mo untedaipoir the outerj threaded extremity of the stem toi bear against 5 the outer side of the lever,: and extend through thes'lotQG, as elearly shown. A collar "28 on 1 the stem bears *against; thel inner side of the lever,- and.a1spring 27ris coiled around the stem -between the said 'collar-and the outer end of the head so as to hold the valve normally seated.

"Having thus described the invention, what -iselai med as nevv is A device for the purpose set forth com- '1Jrising a thermostatic tube to communicate with a steam supply pipe, a head fitted to and closing the outer end of sai d' thermostatic tubeand having an arm projecting obliquely therefrom and beyond the outer end thereof, said -l1ea-d being I provided .inter-iorly with; a .vent passage communicating with: the interiorofthethermostatic tu be, a

valve seati n gluponsthe innerend of thehead toclose said vent passageand having its of ithe levelgaan adjusting member mormted in and :passing through-the (free end ofthe lever operatively engaged with the outer: end of the valve stem and .a.- lock'ing .member bearing-against the :lever .to hold-the adj Listing-member; i-nwa set. position -.-relative. -to thelever.

In testimony whereof I aflix my signature;

ANDREW PQSPESEL- I;[L'.%SQ]

tCoPiesunfithispatentamayibe;obtainedi'forafiveaeents each, byraddre'sjng the -".Commissi0nelr of. Patents,

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